package com.kuang.config;

import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class LoginHanderInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {

        //登录成功之后，存在用户session
        Object loginUser = request.getSession().getAttribute("loginUser");

        if (loginUser == null) {//没有登录
            request.setAttribute("msg", "没有权限，请先登录！");
            request.getRequestDispatcher("/idnex.html").forward(request,response);//？多一个空格？
            return false; //进行拦截
        }else {
            return true;  //拦截器放行
        }
    }
}
/*    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {

    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {

    }*/

